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Title: Frustrated Magnetism in Mott Insulating ( V 1 x Cr x ) 2 O 3

Abstract

V2O3 famously features all four combinations of paramagnetic versus antiferromagnetic and metallic versus insulating states of matter in response to percent-level doping, pressure in the GPa range, and temperature below 300 K. Using time-of-flight neutron spectroscopy combined with density functional theory calculations of magnetic interactions, we have mapped and analyzed the inelastic magnetic neutron scattering cross section over a wide range of energy and momentum transfer in the chromium-stabilized antiferromagnetic and paramagnetic insulating phases. Our results reveal an important magnetic frustration and degeneracy of the paramagnetic insulating phase which is relieved by the rhombohedral-to-monoclinic transition at TN = 185 K. This leads to the recognition that magnetic frustration is an inherent property of the paramagnetic phase in (V1-xCrx)2O3 and plays a key role in suppressing the magnetic long-range-ordering temperature and exposing a large phase space for the paramagnetic Mott metal-insulator transition to occur.

Authors:
; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Institute for Quantum Matter (IQM); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1495580
Alternate Identifier(s):
OSTI ID: 1505333
Grant/Contract Number:  
3211-2440; SC0019331; SC0016166; AC02-05CH11231; AC05-00OR22725
Resource Type:
Published Article
Journal Name:
Physical Review. X
Additional Journal Information:
Journal Name: Physical Review. X Journal Volume: 9 Journal Issue: 1; Journal ID: ISSN 2160-3308
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Leiner, J. C., Jeschke, H. O., Valentí, R., Zhang, S., Savici, A. T., Lin, J. Y. Y., Stone, M. B., Lumsden, M. D., Hong, Jiawang, Delaire, O., Bao, Wei, and Broholm, C. L. Frustrated Magnetism in Mott Insulating ( V 1 − x Cr x ) 2 O 3. United States: N. p., 2019. Web. doi:10.1103/PhysRevX.9.011035.
Leiner, J. C., Jeschke, H. O., Valentí, R., Zhang, S., Savici, A. T., Lin, J. Y. Y., Stone, M. B., Lumsden, M. D., Hong, Jiawang, Delaire, O., Bao, Wei, & Broholm, C. L. Frustrated Magnetism in Mott Insulating ( V 1 − x Cr x ) 2 O 3. United States. https://doi.org/10.1103/PhysRevX.9.011035
Leiner, J. C., Jeschke, H. O., Valentí, R., Zhang, S., Savici, A. T., Lin, J. Y. Y., Stone, M. B., Lumsden, M. D., Hong, Jiawang, Delaire, O., Bao, Wei, and Broholm, C. L. Thu . "Frustrated Magnetism in Mott Insulating ( V 1 − x Cr x ) 2 O 3". United States. https://doi.org/10.1103/PhysRevX.9.011035.
@article{osti_1495580,
title = {Frustrated Magnetism in Mott Insulating ( V 1 − x Cr x ) 2 O 3},
author = {Leiner, J. C. and Jeschke, H. O. and Valentí, R. and Zhang, S. and Savici, A. T. and Lin, J. Y. Y. and Stone, M. B. and Lumsden, M. D. and Hong, Jiawang and Delaire, O. and Bao, Wei and Broholm, C. L.},
abstractNote = {V2O3 famously features all four combinations of paramagnetic versus antiferromagnetic and metallic versus insulating states of matter in response to percent-level doping, pressure in the GPa range, and temperature below 300 K. Using time-of-flight neutron spectroscopy combined with density functional theory calculations of magnetic interactions, we have mapped and analyzed the inelastic magnetic neutron scattering cross section over a wide range of energy and momentum transfer in the chromium-stabilized antiferromagnetic and paramagnetic insulating phases. Our results reveal an important magnetic frustration and degeneracy of the paramagnetic insulating phase which is relieved by the rhombohedral-to-monoclinic transition at TN = 185 K. This leads to the recognition that magnetic frustration is an inherent property of the paramagnetic phase in (V1-xCrx)2O3 and plays a key role in suppressing the magnetic long-range-ordering temperature and exposing a large phase space for the paramagnetic Mott metal-insulator transition to occur.},
doi = {10.1103/PhysRevX.9.011035},
journal = {Physical Review. X},
number = 1,
volume = 9,
place = {United States},
year = {Thu Feb 21 00:00:00 EST 2019},
month = {Thu Feb 21 00:00:00 EST 2019}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevX.9.011035

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Cited by: 17 works
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